Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 25, Issue 12, Pages 1515-1522Publisher
WILEY
DOI: 10.1002/pat.3395
Keywords
graphene/polymer-matrix nanocomposites; in-situ thermal reduction; friendly; reinforcement
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Funding
- National Nature Science Foundation of China [10872071, 50973035, 50903033]
- National Natural Science Foundation of China-Guangdong Joint Foundation Project [U1201242]
- National Key Technology R&D Program of China [2009BAI84B05, 2009BAI84B06]
- Program for New Century Excellent Talents in University [NCET-11-0152]
- Pearl River Talent Fund for Young Sci-Tech Researchers of Guangzhou City [2011J2200058]
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This study aims to achieve a molecule-level dispersion of graphene nanosheets (GNSs) and a maximum interfacial interaction between GNSs and a polymer matrix. GNS-reinforced poly (ethylene glycol) (PEG)/poly (lactic acid) (PLA) nanocomposites are obtained by a facile and environment-friendly preparation method. Graphite oxide and GNSs are characterized by atomic force microscopy, Raman spectroscopy, and X-ray diffraction. Scanning electron microscopy shows that the state of dispersion of the GNS in the PEG/PLA matrix is distribution. The tensile strength and Young's modulus increases by 45% and 188%, respectively, with the addition of 4.0 wt% GNSs. The thermal stability of the GNS-based nanocomposites also improves. Differential scanning calorimetry indicates that GNSs have no remarkable effect on the crystallinity of the nanocomposites. The effective reinforcement of the nanocomposites is mainly attributed to the highly strong molecular-level dispersion of the GNSs in the polymer matrix. Copyright (c) 2014 John Wiley & Sons, Ltd.
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